Construction Defects in Portugal: A Buyer’s Guide to Rights, Deadlines, and Independent Expert Reports

Step 1: Work Out Which Legal Regime Applies to You

Portuguese law does not treat “a construction defect” as a single category. Three different frameworks can apply, and the one that governs your case determines your deadlines and remedies.

1. Buying a new or resale property from a professional seller (developer, construction company, real estate company) as a private individual for personal use. This falls under consumer protection law, currently Decree-Law 84/2021, which transposed the EU Sale of Goods Directive. The seller must deliver the property in conformity with the contract — matching agreed quality, safety, habitability, and functional standards. If you bought as a private consumer from a business, you get the strongest protection.

2. Buying a property in Portugal from a private seller as a private buyer (a resale between individuals, with no developer, construction company, or estate agency acting as seller) — or buying as a company, through a fund, or via a special-purpose vehicle. Because DL 84/2021 only applies where the seller is a professional/business dealing with a consumer, a straightforward private-to-private resale falls entirely outside consumer protection law, no matter how much of a “consumer” you personally feel like. Both this scenario and the corporate-buyer scenario fall back on the general rules of the Código Civil on the sale of defective goods (venda de coisa defeituosa, Articles 913–922), which are considerably less generous — and far less forgiving on timing — than consumer law. This is the single most common trap for private buyers of older Portuguese homes: they assume the “five/ten-year warranty” they’ve read about applies to their purchase, when in fact they bought from a private individual and are on a much shorter clock (see Step 2 below).

3. Commissioning construction work directly (a self-build, renovation, or turnkey contract with a builder). This is governed by the law of contracts for work (empreitada), Articles 1207 and following of the Código Civil, with a special rule for buildings in Article 1225 CC. This regime applies whether you are the original client or a later purchaser who steps into the developer’s rights against the builder.

A useful nuance: Portuguese sales law does not distinguish between newly built and older properties when it comes to hidden defect liability under the Código Civil — the same basic seller warranty against hidden defects applies to both, subject to the consumer-law overlay described above where relevant.

Step 2: Know the Deadlines — They Are Unforgiving

This is where most buyers lose their rights, not because the defect wasn’t real, but because they acted too late or in the wrong order. Deadlines under Portuguese law for defects are typically treated as caducidade (a strict forfeiture period) rather than ordinary limitation — meaning courts apply them rigidly, with none of the flexibility of a standard statute of limitations.

Under consumer law (Decree-Law 84/2021), for property bought from a professional seller:

• The overall warranty period is five years for standard elements and ten years for structural elements (foundations, load-bearing walls, beams, slabs, retaining structures). Everything else — finishes, installations, non-structural walls — falls under the five-year track.
• Once you discover a defect, notify the seller without undue delay. There is no fixed number of days, but courts increasingly expect prompt notice once you have credible knowledge, not merely a suspicion.
• The law does not fix a strict repair deadline either; repairs must happen within a “reasonable time,” weighed against the severity of the defect and the hardship it causes you.
• Critically: once you have notified the seller, you must start legal proceedings within three years of that notification if the matter isn’t resolved. Miss that window and the claim is generally lost

Under the general Código Civil sale-of-goods rules — this is the regime that applies if you bought from a private individual, not from a business:

This is where the clock is shortest, and where buyers most often get caught out. The relevant rules are Articles 913, 916, and 917 CC:

• Article 913 CC: the seller is liable if the property has a hidden defect (vício oculto) — one that reduces its value or fitness for the intended purpose, or that means it lacks qualities the seller had guaranteed — and the buyer didn’t know and couldn’t reasonably have known about it when buying.
• Article 916(1) CC: you must formally notify the seller of the defect (denúncia) — unless the seller knowingly concealed it from you (dolo/bad faith), in which case this notice requirement falls away and you keep your full rights regardless of when you complain.
• Article 916(3) CC — the key deadline for real estate: notice must be given within one year of discovering the defect, and that discovery-and-notice window must itself fall within five years of the property being handed over to you. In other words: five years is your absolute outer limit from delivery, and within that period the one-year clock starts ticking the moment you become aware of the problem.
• Article 917 CC, as clarified by the Supreme Court of Justice (STJ) in a binding 2023 uniformisation of case law: once you’ve sent that notice, you then have only six months from the date of the notice to actually file a court case (or reach a settlement), whichever remedy you’re pursuing — annulment, repair, replacement, price reduction, or damages. Miss that six-month window and the right is gone, automatically and without exception, even if your underlying claim was perfectly valid.

That six-month litigation deadline is dramatically shorter than the three-year deadline under consumer law described above, and it is easy to miss if you spend those months in good-faith negotiation with the seller without a lawyer tracking the calendar in parallel. Practically, this means: as soon as you send the seller written notice of a hidden defect in a private resale, you should already be consulting a lawyer about issuing proceedings, not waiting to see how negotiations play out.

One further point specific to private resales: if you bought from someone who was themselves not the original builder — say, the previous owner who bought the house new — Portuguese case law treats the deadlines as running from the original handover from builder to first owner in some circumstances, and your rights against the original builder may be more limited than your rights against your immediate private seller. A lawyer should map out exactly who you can claim against (your seller, and potentially the original developer/builder) and on what basis.

Under the construction-contract regime (Article 1225 CC, empreitada), typically relevant for self-builds and claims against the original builder:

• You must inspect the finished work before acceptance (Article 1218 CC) and may insist that this inspection be carried out with a technical expert present.
• Once a defect appears, you must give the builder a formal defect notice (denúncia) within one year of becoming aware of it — a materially longer window than under ordinary work-contract rules, recognizing that building defects (leaks, damp, cracking) often surface slowly.
• After sending that notice, if the matter is not resolved, you must file suit within one year of the notice.
• The overall long-stop period during which the builder remains liable at all is five years from handover of the building.
• Both one-year windows are forfeiture periods (caducidade), not ordinary limitation periods — there is generally no room for later “I forgot” arguments.

Practical takeaway: the moment you suspect a defect, treat the clock as already running. Send written notice — registered mail or email with confirmed receipt is strongly recommended even though the law doesn’t mandate a specific form — and calendar the follow-on litigation deadline immediately, rather than waiting to see if informal negotiations succeed.

Step 3: What You Can Actually Claim

Once a defect is properly notified within the applicable window, Portuguese law gives you, in roughly descending order of severity:

• Free repair of the defective element (the usual first remedy).
• Replacement, where repair isn’t feasible.
• Price reduction, proportional to the loss in value.
• Termination of the contract, reserved for serious defects that undermine the purpose of the purchase.
• Damages, for additional losses caused by the defect (e.g., water damage to furniture from a roof leak), on top of whichever primary remedy applies.

The seller/builder generally gets the first opportunity to repair before you escalate to reduction or termination — courts expect buyers to have given a genuine chance to fix the problem, properly documented.

For private-to-private sales specifically, Portuguese courts apply the same short Article 916/917 CC deadlines to all of these remedies — not just to annulment. So whether you ultimately want the seller to pay for repairs, refund part of the price, or unwind the sale entirely, the same one-year discovery/notice window and six-month litigation window described in Step 2 govern all of it.